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KYN28A-12 High Voltage Switchgear

The KYN28A-12 metal-clad withdrawable switchgear is designed for indoor three-phase 50/60Hz power systems with a rated voltage of 6–10kV. It is used for receiving and distributing three-phase AC power, automatic circuit switching, and providing protection, monitoring, and event recording for faults (including overload, short-circuit, and overvoltage conditions).

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High-voltage switchgear series

Keyword：

Smart power distribution series

Power distribution box series

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Product Description

　　The KYN28A-12 metal-clad withdrawable switchgear is designed for indoor three-phase 50/60Hz power systems with a rated voltage of 6–10kV.It is used for receiving and distributing three-phase AC power, automatic circuit switching, fault isolation (including overload, short-circuit, and overvoltage), as well as protection, monitoring, and event recording functions.It is widely applied in power plants, substations, metallurgical and chemical industries, rail transit systems, industrial facilities, residential communities, high-rise buildings, and other applications, providing users with safe, reliable, flexible, and intelligent power distribution solutions.

　　The switchgear is designed and manufactured in full compliance with GB/T 3906 — AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages from 3.6kV to 40.5kV.DL/T 404 — AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages from 3.6kV to 40.5kV,GB/T 11022 — Common Technical Requirements for High-Voltage Switchgear and Controlgear,and DL/T 593 — Common Technical Requirements for High-Voltage Switchgear and Controlgear.

Technical Advantages

　　1. The rated current range of SHARESUN Electric high-voltage switchgear includes 630A, 1250A, 2500A, 3150A, 4000A, and 5000A.

　　2. Our KYN28 metal-clad withdrawable switchgear has successfully passed type tests, internal arc tests, damp heat (condensation) tests, electromagnetic compatibility (EMC) tests, high-altitude tests, and seismic tests, and fully complies with the Five-Prevention interlocking requirements and the “Eighteen Major Anti-Accident Measures for Power Grids” issued by the State Grid Corporation of China.

　　3. This product has obtained more than 10 national patents, demonstrating strong R&D capability and superior performance.

　　4. All primary busbars inside the switchgear are designed with rounded edges to prevent corona discharge caused by humid environments.

　　5. The new-generation intelligent withdrawable switchgear is equipped with our self-developed one-button intelligent control device, enabling simplified one-button operation. It also supports cloud-based remote monitoring, video surveillance, and control.

　　6. The company implements advanced assembly processes and stringent quality inspection standards to ensure product safety and reliability.

Technical Parameters

Parameter Name		Unit	Technical Data
Rated voltage		kV	6kV / 10kV
Maximum system voltage		kV	7.2kV / 12kV
Rated Insulation Level	Power-frequency withstand voltage (1 min)	kV	Phase-to-phase and phase-to-earth: 42kV; across open contacts: 48kV
	Lightning impulse withstand voltage:	kV	Phase-to-phase and phase-to-earth: 75kV; across open contacts: 85kV
Rated Frequency		Hz	50
Rated Current		kA	630, 1250, 2500, 3150, 4000, 5000
Short-time Withstand Current (4s)		kA	20, 25, 31.5, 40
Rated Peak Withstand Current		kA	50, 63, 80, 100
Degree of Protection			Enclosure protection class: IP41;With circuit breaker compartment door open: IP2X
Partial Discharge		pC	≤50pC at 13.2kV
Seismic Qualification		AG5	Seismic class AG5, seismic intensity level 9
High-altitude Capability		m	Suitable for altitudes up to 4500m
Arc Burning Grade		AFLR	Internal arc classification: AFLR Busbar and cable compartments: 31.5kA 0.8s / 40kA 0.8s Circuit breaker compartment: 31.5kA 1s / 40kA 1s

： None

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